JACKSON, WY \u2014 UPDATE: The Teton County Coroner's Office confirmed the identity of the victim as George Erwin Roulhac, 69, of Greenville, Mississippi.\n\nA man has died on the Snake River today.\n\nThe cause of death is unknown at this time. Teton County Sheriff deputies say a boat carrying three boaters hit a rock pile just before the bridge near the KOA Campground, throwing them into a pillar under the bridge. The boat overturned, but at first, all passengers were accounted for. The victim, an older man, was seen near the shore and said he was fine. But when his companions looked back seconds later, he was out of sight.\n\nThe victim was pulled out of the river on the banks of the KOA Campground. He was unresponsive, and CPR resuscitation efforts were unsuccessful. A sheriff deputy in the area responded immediately, and Fire\/EMS responded shortly after with multiple ambulances.\n\nThe other boaters were accounted for within a few minutes, said Fire\/EMS Batallion Chief Mike Moyer. Teton County Search and Rescue was paged to conduct a search, but quickly called off when it was confirmed all boaters were accounted for.\n\nA medical condition is suspected, but not confirmed.\n\nFire\/EMS says the drift boat has been recovered. The other boaters who were on the drift boat are all OK.\n\nA wave train under the bridge is becoming increasingly more dangerous as bridge construction causes it to grow in size and velocity. WYDOT advises river users to take extra caution on the stretch from South Park to Hoback.